Amazing what a spur to development Pete's original thread has been.
It's been a long road for me to get to this point, v1 performed OK, but not really good enough I didn't think. I tried keeping the Buttress threaded connection of the Laing pump, but found that I could not get performance more than an few % above the stock pump, and never as good as v1. Shame too because I bought an indexable American Buttress threading bar (big$ ), but this is the design I've ended up with.
This basically a development version of the pump head, the CNC code, the feed rates and fixturing process is still being worked out, and I am still working on the mounting arrangement. Performance came first and now that it's up to par, it's details time .
I'm not going to show my volute just yet, as really it's the only thing that separates this pump from the EK and Koolance. Those guys have way more resources to throw at this product than I do. It's a radial O-ring design which allows me to have a much flatter volute than the buttress threaded design. As a result, I could come much closer to a textbook example of a standard pump volute. Of course since there is no longer a threaded ring, I'm using 4 little delrin clamps and stainless M5 button head cap screws.
Now, if you don't mind please give me your thoughts on the following:
1) How important is a second "fillport" at the pump suction? If I were to implement a fillport, it would be a true fillport, i.e. no possibility to use it as the suction since it would have awful flow geometry, and could only be used for de-aerating and filling.
2) How important are pump looks and bling factor? I'm going to try to work out a creative and industrial looking profile, just wondering how much effort should go there.
3) Any other hints and general suggestions to help me? I'd really appreciate it
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1. Not important.
2. Not important.
3. Not to expensive if possible
So this is supposed to be even better than the EK and Koolance top? God damnit!! I just bought an EK top
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I don't care for bling either, and wouldn't shell out any extra dough or sacrifice performance for it. The 655 in particular just isn't a particularily attractive pump and I don't think any decoration on the top is going to change that.
I don't care for bling either, and wouldn't shell out any extra dough or sacrifice performance for it. The 655 in particular just isn't a particularily attractive pump and I don't think any decoration on the top is going to change that.
Agreed, although I do care for bling to a reasonable extent, you can't change the look on the pump itself.
Good work.
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That looks gorgeous and looks like it takes much less space. I like it as is.
Are you running it at 24v? If so, can we see the results at 12v.
Maybe 2 holes on the bottom and 2 drilled holes on the sides.. No need to bling it up.. looks gorgeous
These are 12V results, I should have labeled that.
Running either the stock Laing housing or this housing, I notice a lot of high frequency vibration, probably 1st order of the impeller speed being transmitted to the table. I've noticed that EK and Koolance just use tapped holes, but Swiftech supplies a gel pad to mount the housing My assumption has been that hard mounting the pump to the case may create other little BSR (I'm an automotive engineer, and BSR is a standard term, means buzz, squeak, rattle).
Perhaps two versions? A cheaper tapped hole version, and a more expensive version that has some isolation?
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These are 12V results, I should have labeled that.
Running either the stock Laing housing or this housing, I notice a lot of high frequency vibration, probably 1st order of the impeller speed being transmitted to the table.
High frequency vibration.... Do you think it's Cavitation noise???
No Walt, it clearly cavitates below about 0.6 GPM, this is a steady tone, same freq as rotation, probably rotor imbalance.
It's not very loud at all, but I would think it could excite other parts of a case to buzz. This happens with the stock top and my top, it's just a characteristic of the pump I think.
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No Walt, it clearly cavitates below about 0.6 GPM, this is a steady tone, same freq as rotation, probably rotor imbalance.
It's not very loud at all, but I would think it could excite other parts of a case to buzz. This happens with the stock top and my top, it's just a characteristic of the pump I think.
correct for its a dc/ac pulse phase motor, the sound you hear is the coils energizing @ a frequency
note when change setting on the vario different tone/pitch
note for cavitation look for bubbles starting near inlet
Last edited by KaptCrunch; 09-06-2008 at 07:00 AM.
correct for its a dc/ac pulse phase motor, the sound you hear is the coils energizing @ a frequency
note when change setting on the vario different tone/pitch
When changing RPM if the frequency change is from the pump and not the motor, it's usually due to hydraulic pressure changes witch apply lateral force on the impeller. One of the things a volute does is help Balance the hydraulic pressure inside the pump head. Most pumps have a "sweet spot" (RPM wise)
if it's motor noise thats different.
In my first life I worked as deep mine engineer. pumped a lot of water.
Eric would be able to determine pump noise from motor noise.
BTW nice compact design Eric, can't wait to see the finished product
These are 12V results, I should have labeled that.
Running either the stock Laing housing or this housing, I notice a lot of high frequency vibration, probably 1st order of the impeller speed being transmitted to the table. I've noticed that EK and Koolance just use tapped holes, but Swiftech supplies a gel pad to mount the housing My assumption has been that hard mounting the pump to the case may create other little BSR (I'm an automotive engineer, and BSR is a standard term, means buzz, squeak, rattle).
Perhaps two versions? A cheaper tapped hole version, and a more expensive version that has some isolation?
I wouldn't worry about it to much, most of us spl anal retentites will find some convoluted personal "best" vibration damping method, or just hang the pump from the tubes. Threaded holes are sufficient.
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i don't care about the fillport, and don't care too much about the looks (though everyone says that until Feser comes up with a butt-ugly pump top, and then they go crazy about how they won't buy it because it "looks cheap"). I mainly just care about performance.
i don't care about the fillport, and don't care too much about the looks (though everyone says that until Feser comes up with a butt-ugly pump top, and then they go crazy about how they won't buy it because it "looks cheap"). I mainly just care about performance.
Maybe 2 designs a cheaper "no thrills" but "performance" model and one made for the guys you like bells and whistles,of course that would cost more, and if you get what appears to be "bell and whistles" at the same cost (from another manufacturer),you probably got a cheaper pump.Cost cuts in either motor, or the way the pump way built.
DetriotAC wouldn't put out a product that didn't meet very high standards in performance & reliability..
2) How important are pump looks and bling factor? I'm going to try to work out a creative and industrial looking profile, just wondering how much effort should go there.
I am planning on using inexpensive gold leaf on a pump or two for some real Bling.
EDIT: forgot to say, I really like the clean look you've got going on so far.
I am planning on using inexpensive gold leaf on a pump or two for some real Bling.
EDIT: forgot to say, I really like the clean look you've got going on so far.
Thats a great idea and easy to apply.
Thats just a prototype,I think Eric is the kind of guy who will produce some designs that,lets say just isn't your everyday box and will out perform any thing out there. If he has the time and ambition, Or he won't waste his time if he can't "beat the socks off everyone else" .
I'm definitely liking this design. Fillports aren't a need for me but it would be nice to have screwholes for a stand or something so that its easier to change the pump's position.
No Walt, it clearly cavitates below about 0.6 GPM, this is a steady tone, same freq as rotation, probably rotor imbalance.
It's not very loud at all, but I would think it could excite other parts of a case to buzz. This happens with the stock top and my top, it's just a characteristic of the pump I think.
Curious what your plans are with this.
Are you going to mass produce it and sell it yourself or have a store sell it or what..
Let us know, because I think I'm up for a few
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Another! D5 vario pump top. Shootout Time?
), but this is the design I've ended up with.
.
My assumption has been that hard mounting the pump to the case may create other little BSR (I'm an automotive engineer, and BSR is a standard term, means buzz, squeak, rattle). 
I forgot "you must" 
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